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CVE-2018-14558

Tenda AC7, AC9, and AC10 Routers Command Injection

9.8 CRITICALActively exploited (CISA KEV)Public exploitEPSS 8.51%
  1. Published30 Oct 2018
  2. Added to CISA KEV3 Nov 2021
  3. Remediation due3 May 2022
Actively exploited (CISA KEV)

Tenda AC7, AC9, and AC10 devices contain a command injection vulnerability due to the "formsetUsbUnload" function executes a dosystemCmd function with untrusted input. Successful exploitation allows an attacker to execute OS commands via a crafted goform/setUsbUnload request.

Added to KEV: 3 Nov 2021Federal remediation due: 3 May 2022

Description

An issue was discovered on Tenda AC7 devices with firmware through V15.03.06.44_CN(AC7), AC9 devices with firmware through V15.03.05.19(6318)_CN(AC9), and AC10 devices with firmware through V15.03.06.23_CN(AC10). A command Injection vulnerability allows attackers to execute arbitrary OS commands via a crafted goform/setUsbUnload request. This occurs because the "formsetUsbUnload" function executes a dosystemCmd function with untrusted input.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Tenda Ac10 Firmware≤ 15.03.06.23_cn
Tenda Ac7 Firmware≤ 15.03.06.44_cn
Tenda Ac9 Firmware≤ 15.03.05.19\(6318\)_cn

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2018-14558 being actively exploited?

Yes. CVE-2018-14558 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021.

How severe is CVE-2018-14558?

CVE-2018-14558 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 8.51% probability of exploitation.

Which products are affected by CVE-2018-14558?

Affected products include Tenda Ac10 Firmware, Tenda Ac7 Firmware, Tenda Ac9 Firmware.

How do I fix CVE-2018-14558?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2018-14558 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.